CN210273753U - Speed stabilizer for AC electric tool - Google Patents
Speed stabilizer for AC electric tool Download PDFInfo
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- CN210273753U CN210273753U CN201921477455.7U CN201921477455U CN210273753U CN 210273753 U CN210273753 U CN 210273753U CN 201921477455 U CN201921477455 U CN 201921477455U CN 210273753 U CN210273753 U CN 210273753U
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- speed
- motor spindle
- circuit board
- electric tool
- cursor
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Abstract
The utility model discloses an alternating current electric tool's steady speed device, it includes light sensor and steady speed circuit board, light sensor connect in steady speed circuit board, light sensor and motor spindle's outer peripheral face relative and with motor spindle's outer peripheral face interval sets up, be provided with the cursor on motor spindle's the outer peripheral face, motor spindle rotation a week with light sensor aims at once. The optical sensor is arranged on the speed stabilizing circuit board, the cursor is arranged on the outer peripheral surface of the motor spindle, so that the rotating speed of the rotating motor spindle can be measured, other parts are not required to be additionally arranged, the structure is simple, the assembly cost is saved, the speed measurement is accurate, and the running speed of the alternating current electric tool is stable.
Description
Technical Field
The utility model relates to an electric tool field, in particular to exchange electric tool's speed stabilizing device.
Background
Generally, a speed stabilizing circuit board for stabilizing the rotating speed of a motor spindle is arranged in an alternating current electric tool, a sensor for measuring the rotating speed is arranged on the speed stabilizing circuit board and used for measuring the rotating speed of the motor spindle in real time, and then an electric signal is fed back to the speed stabilizing circuit board, so that the speed stabilizing circuit board adjusts the voltage and then adjusts the rotating speed of the motor spindle.
And need install a magnetic ring on motor spindle among the prior art, because the magnetism of magnetic ring is relatively weak, the sensor just can sense speed very near from the magnetic ring, and this speed that just makes the sensor sense is inaccurate to the signal of feeding back to the steady speed circuit board is inaccurate, makes motor spindle's rotational speed unstable, thereby leads to the stability of working accuracy and performance not high. In addition, the sensor is additionally provided with a magnetic ring on the main shaft and a snap spring for fixing the magnetic ring, so that the assembly cost is increased.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to install magnetic ring and jump ring additional on motor spindle for overcoming the steady speed device of the electric tool of exchanging among the prior art, increase assembly cost's defect, provide an electric tool's steady speed device of exchanging.
The utility model discloses an above-mentioned technical problem is solved through following technical scheme:
the utility model provides an alternating current electric tool's speed stabilizing device, its characterized in that, it includes optical sensor and speed stabilizing circuit board, optical sensor connect in speed stabilizing circuit board, optical sensor and motor spindle's outer peripheral face relative and with motor spindle's outer peripheral face interval sets up, be provided with the cursor on motor spindle's the outer peripheral face, motor spindle rotates a week with optical sensor aligns once.
In the scheme, the optical sensor is arranged on the speed stabilizing circuit board, the cursor is arranged on the peripheral surface of the motor spindle, the rotating speed of the rotating motor spindle can be measured, other parts do not need to be additionally arranged, and the motor spindle speed stabilizing circuit is simple in structure and easy to assemble.
Preferably, the optical sensor includes a measuring portion and a connecting portion, the connecting portion is fixed on the speed stabilizing circuit board, and the measuring portion is opposite to the outer peripheral surface of the motor spindle where the cursor is located.
Preferably, the connecting part is welded with the speed stabilizing circuit board.
In this scheme, with connecting portion and steady speed circuit board welding, need not the wiring can be with on the signal transmission of light sensor reaches steady speed circuit board, simple process, intensity is high, does not need other extra spare part, saves the cost.
Preferably, the connecting part is connected with the speed stabilizing circuit board by a wire.
In the scheme, the connecting part is in line connection with the speed stabilizing circuit board and is used for transmitting the signal of the optical sensor to the speed stabilizing circuit board.
Preferably, the measuring part is provided with an LED light emitting port, and the LED light emitting port can be aligned to the cursor.
In the scheme, the LED light emitting port is arranged on the measuring part, so that the motor spindle rotates for a circle, and the LED light emitting port can be aligned with the cursor once to realize the measurement of the rotating speed of the motor spindle.
Preferably, the speed stabilizing circuit board is fixed on the handle shell, and the speed stabilizing circuit board is electrically connected with both a power supply of the alternating current electric tool and a motor of the alternating current electric tool.
In the scheme, the speed stabilizing circuit board is fixed on the handle shell and is static relative to the motor stator, the motor spindle rotates relative to the motor stator, the speed stabilizing circuit board is electrically connected with a power supply of the alternating current electric tool, no extra power supply is needed in the operation of the speed stabilizing circuit board, and energy is saved. The speed stabilizing circuit board is electrically connected with a motor of the alternating current electric tool so as to regulate the voltage of the motor of the alternating current electric tool and stabilize the rotating speed of the motor.
Preferably, the cursor is adhered to the outer peripheral surface of the motor spindle.
In the scheme, the cursor is pasted on the peripheral surface of the motor spindle, and the process is simple.
Preferably, the cursor is a groove arranged on the outer peripheral surface of the motor spindle.
In the scheme, the cursor is a groove arranged on the outer peripheral surface of the motor spindle, so that the cursor is not easy to drop and high in reliability.
Preferably, the projection of the cursor along the radial direction of the motor spindle is rectangular.
In the scheme, the cursor mainly plays a role in identification, and the rectangular cursor is simple in structure, easy to process and easy to recognize.
On the basis of the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention.
The utility model discloses an actively advance the effect and lie in: the utility model discloses a speed stabilizing device of alternating current electric tool through set up light sensor on the speed stabilizing circuit board, sets up the cursor and can realize measuring the rotational speed of pivoted motor spindle on motor spindle's outer peripheral face, need not additionally increase other spare parts, simple structure, easy assembly saves assembly cost, and it is accurate to test the speed for alternating current electric tool's functioning speed is steady.
Drawings
Fig. 1 is a schematic structural diagram of a speed stabilizer of an ac electric tool according to a preferred embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a motor spindle and a cursor in a speed stabilizer of an ac electric tool according to a preferred embodiment of the present invention.
Description of reference numerals:
speed-stabilized circuit board 10
Connecting part 201
LED light emitting port 2021
Detailed Description
The present invention will be more clearly and completely described below by way of examples and with reference to the accompanying drawings, but the present invention is not limited thereto.
As shown in fig. 1 to 2, the utility model provides a speed stabilizing device of ac electric tool, it includes light sensor 20 and speed stabilizing circuit board 10, light sensor 20 is connected in speed stabilizing circuit board 10, light sensor 20 relative with motor spindle 30's outer peripheral face and with motor spindle 30's outer peripheral face interval setting, be provided with cursor 301 on motor spindle 30's the outer peripheral face, motor spindle 30 rotates a week and aligns once with light sensor 20.
Set up light sensor 20 on steady speed circuit board 10, set up cursor 301 on the outer peripheral face of motor spindle 30 and can realize measuring the rotational speed of rotatory motor spindle 30, need not additionally increase other spare parts, simple structure, easy assembly saves assembly cost, tests the speed the accuracy for alternating current electric tool's functioning speed is steady.
The optical sensor 20 includes a measuring portion 202 and a connecting portion 201, the connecting portion 201 is connected to the speed stabilizing circuit board 10, and the measuring portion 202 is opposite to the outer peripheral surface of the motor spindle 30 where the cursor 301 is located. The measurement portion 202 is provided with an LED light emitting port 2021, and the LED light emitting port 2021 can be aligned with the cursor 301. The connection portion 201 is soldered to the speed stabilizing circuit board 10, but the connection portion 201 may be connected to the speed stabilizing circuit board 10 by a wire. The LED light emitting port 2021 is disposed on the measuring portion 202, and the LED light emitting port 2021 can be aligned with the cursor 301, so that the motor spindle 30 rotates one circle, and the LED light emitting port 2021 can be aligned with the cursor 301 once to measure the rotation speed of the motor spindle 30. The connecting part 201 is welded with the speed stabilizing circuit board 10, signals of the optical sensor can be transmitted to the speed stabilizing circuit board without wiring, the process is simple, the strength is high, other extra parts are not needed, and the cost is saved. Of course, the connection portion 201 and the speed stabilizing circuit board 10 can also transmit signals to the speed stabilizing circuit board 10 through wire connection.
Of course, the relative position between the surface of the measurement portion 202 where the LED light emitting port 2021 is located and the connection portion 201 is not limited, and the surface of the measurement portion 202 where the LED light emitting port 2021 is located and the connection portion 201 may be connected to each other and perpendicular to each other, or may be parallel to each other. In this embodiment, the surface of the measuring portion 202 where the LED light emitting port 2021 is located is perpendicular to the connecting portion 201, the surface of the measuring portion 202 where the LED light emitting port 2021 is located faces the outer peripheral surface of the motor spindle 30, the cursor 301 is disposed on the outer peripheral surface of the motor spindle 30, the LED light emitting port 2021 is disposed on the measuring portion 202, and the LED light emitting port 2021 is exactly aligned with the outer peripheral surface of the motor spindle 30 where the cursor 301 is located.
In this embodiment, in order to facilitate the connection of the whole of the speed stabilizing circuit board 10 and the optical sensor 20 with the handle casing, the casing is disposed outside the whole of the speed stabilizing circuit board 10 and the optical sensor 20, and the casing can also be used for dust prevention and can make the connection of the speed stabilizing circuit board 10 and the optical sensor 20 more firm. It should be noted that, since a housing is provided outside the whole after the connection of the speed stabilizing circuit board 10 and the optical sensor 20, the specific structure of the speed stabilizing circuit board 10 and the optical sensor 20 is not shown in fig. 1, and the relevant reference numerals in the speed stabilizing circuit board 10 and the optical sensor 20 refer to the positions of the components in the speed stabilizing circuit board 10 and the optical sensor 20 inside the housing, rather than directly referring to the components.
The speed stabilizing circuit board 10 is fixed on the handle shell (the connecting part of the speed stabilizing circuit board 10 and the handle shell is not shown in the attached drawing), and the speed stabilizing circuit board 10 is electrically connected with a power supply of the alternating current electric tool and a motor of the alternating current electric tool. The speed stabilizing circuit board 10 is fixed on the handle shell, the speed stabilizing circuit board 10 is static relative to the motor stator 40, the motor spindle 30 rotates relative to the motor stator 40, the speed stabilizing circuit board 10 is electrically connected with a power supply of the alternating current electric tool, no extra power supply is needed for the operation of the speed stabilizing circuit board 10, and energy is saved. The speed stabilizing circuit board 10 is electrically connected to a motor of the ac electric tool to adjust a voltage of the motor of the ac electric tool to stabilize a rotation speed of the motor.
The cursor 301 is attached to the outer peripheral surface of the motor spindle 30. The cursor 301 may also be a groove provided on the outer circumferential surface of the motor spindle 30. The projection of the cursor 301 in the radial direction of the motor spindle 30 is rectangular. The connection mode of the cursor 301 and the motor spindle 30 is not limited, and the shape of the cursor 301 and the position on the motor spindle 30 are also not limited, and it is certainly necessary to ensure that the LED light emitting port 2021 can be aligned with the cursor 301. The cursor 301 is adhered to the outer peripheral surface of the motor spindle 30, and the process is simple. The cursor 301 is a groove arranged on the outer peripheral surface of the motor spindle 30, is not easy to fall off, and has high reliability. The cursor 301 mainly plays a role in identification, and the rectangular cursor 301 is simple in structure, easy to process and easy to identify.
As shown in fig. 1 and fig. 2, in the present embodiment, a rectangular mark is pasted on the motor spindle 30 of the ac electric tool as the cursor 301, and the color and material of the cursor 301 are not limited. The speed stabilizing circuit board 10 is mounted on the handle shell, the speed stabilizing circuit board 10 is arranged opposite to the end part of the motor spindle 30, the speed stabilizing circuit board 10 close to the end face of the motor spindle 30 is connected with the connecting part 201 of the optical sensor 20, the measuring part 202 of the optical sensor 20 extends towards the motor spindle 30, the LED light emitting port 2021 can be just aligned to the cursor 301, LED light emitted from the optical sensor 20 irradiates on the peripheral surface of the motor spindle 30, and when the motor spindle 30 rotates for a circle, the light can be just aligned to the cursor 301 once. The optical sensor 20 is electrically connected with the speed stabilizing circuit board 10, and the speed stabilizing circuit board 10 is connected with both the power supply end of the alternating current electric tool and the motor. After the optical sensor 20 measures the rotation speed of the motor spindle 30, a signal is fed back to the speed stabilizing circuit board 10, the speed stabilizing circuit board 10 identifies the speed of the rotation speed of the motor spindle 30, and then the output voltage is adjusted according to the speed of the rotation speed so as to adjust the rotation speed of the motor, so that the rotation speed of the motor is in a constant range. The speed stabilizing device adopting the structure has the advantages of simple structure, few parts, installation cost saving and capability of achieving the purpose of stabilizing the rotating speed of the motor.
Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (9)
1. The utility model provides an alternating current electric tool's speed stabilizing device, its characterized in that, it includes optical sensor and speed stabilizing circuit board, optical sensor connect in speed stabilizing circuit board, optical sensor and motor spindle's outer peripheral face relative and with motor spindle's outer peripheral face interval sets up, be provided with the cursor on motor spindle's the outer peripheral face, motor spindle rotation a week with optical sensor aligns once.
2. The speed stabilizer for ac electric tool according to claim 1, wherein the optical sensor includes a measuring portion and a connecting portion, the connecting portion is fixed on the speed stabilizing circuit board, and the measuring portion is opposite to the outer peripheral surface of the motor spindle where the cursor is located.
3. The speed stabilization apparatus for an ac power tool of claim 2, wherein the connection portion is soldered to the speed stabilization circuit board.
4. The speed stabilization apparatus for an ac power tool of claim 2, wherein the connection portion is wired to the speed stabilization circuit board.
5. The speed stabilizer for ac electric tool according to claim 2, wherein the measuring portion is provided with an LED light emitting port, and the LED light emitting port is aligned with the cursor.
6. The speed stabilizing device of an ac electric tool according to claim 1, wherein the speed stabilizing circuit board is fixed to the handle housing, and the speed stabilizing circuit board is electrically connected to both the power source of the ac electric tool and the motor of the ac electric tool.
7. A speed stabilizer for an AC electric tool as set forth in any one of claims 1-6, wherein said cursor is attached to the outer peripheral surface of said motor spindle.
8. A speed stabilizer for an AC electric tool as set forth in any one of claims 1-6, wherein said cursor is a groove provided on the outer peripheral surface of the motor spindle.
9. A speed stabilizer for an AC electric tool as set forth in any one of claims 1-6, wherein the projection of said cursor in the radial direction of the motor spindle is rectangular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921477455.7U CN210273753U (en) | 2019-09-03 | 2019-09-03 | Speed stabilizer for AC electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921477455.7U CN210273753U (en) | 2019-09-03 | 2019-09-03 | Speed stabilizer for AC electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210273753U true CN210273753U (en) | 2020-04-07 |
Family
ID=70018885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921477455.7U Active CN210273753U (en) | 2019-09-03 | 2019-09-03 | Speed stabilizer for AC electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210273753U (en) |
-
2019
- 2019-09-03 CN CN201921477455.7U patent/CN210273753U/en active Active
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